package collection;

/**
 * 集合间的操作
 */
import java.util.ArrayList;
import java.util.Collection;
public class CollectionDemo4 {
    public static void main(String[] args) {
        Collection c1 = new ArrayList();
        c1.add("java");
        c1.add("c++");
        c1.add(".net");
        System.out.println("c1: "+c1);// c1:[java, c++, .net]

        Collection c2 = new ArrayList();
        c2.add("android");
        c2.add("ios");
        c2.add("java");
        System.out.println("c2:"+c2);//c2:[android, ios, java]

        c1.addAll(c2);//将c2添加到c1中
        System.out.println("c1:"+c1);// c1:[java, c++, .net, android, ios, java]
        System.out.println("c2:"+c2);// c2:[android, ios, java]

        Collection c3 = new ArrayList();
        c3.add("c++");
        c3.add("android");
        c3.add("php");
        System.out.println("c3: "+c3);

        boolean contains = c1.containsAll(c3);//判断c1中是否包含C的元素
        System.out.println("是否包含:"+contains);//false

        //取交集:
        /*
        c1.retainAll(c3);//取出c1中仅保留和c3中的共同元素,c3不改变
        System.out.println("c1:"+c1);//c1:[c++, android]
        System.out.println("c3"+c3);//c3:[c++, android, php]
         */

        //删交集:
        c1.removeAll(c3);//将c1中与c3所共有的元素删除,c3不变
        System.out.println("c1:"+c1);//c1:[java, .net, ios, java]
        System.out.println("c3:"+c3);//c3:[c++, android, php]
    }
}
